Boring-tool



(NO Model.)l JI T. KIEHNER. 2Sheets-Sheet 1.

BORING TOOL. NO. 469,503. Patented Feb. 23, 1892l wn-VNEEEE (No Model.) Y 2 sheets-smet 2:. J. T. KIEHNER.

BORING TOOL.

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UNITED STATES PATENT OFFICE.

JOHN T, KIEHNER, OF PHILADELPHIA, PENNSYLVANIA.

BORING-TOOL.

SPECIFICATION forming part of Letters Patent No. 469,503, dated February 23, 1892.

Application filed November' '7, 1891. Serial No. 4111173- (NO model-i To all whom it may concern:

Be it known that I, JOHN T. KIEHNER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Boring-Tools, of

ywhich the following is a specification.

My invention has relation to tools for boring cylinders and the like, and has for its object to improve the construction and increase the efficiency thereof.

My invention consists in the provision of novel and efficient means whereby the cutting or boring operation may be accomplished in both directions of feed of the boring-bar, the feeding of the latter to be done by hand or automatically, as required, and the tool itself entirely and instantaneously disconnected from or placed in operative relation with the feed-screw, obviating the necessity for running said tool to one of the ends of the screw to secure its disengagement therefrom and the returning of the tool to its initial position thereon before another cut can be made.

My invention further consists in the details of construction and the combinations ofl parts, as hereinafter fully described and claimed, and as shown in the accompanying drawings, wherein- Figure l is a front elevation, Fig. 2, a rear view with a portion removed and exposing part of the interior mechanism, and Fig. 3 a vertical section, of the improved tool. Figs. 4t and 5 are respectively a plan and edge view of a detail. Fig. 6 is a plan view of the under side of the feed-casing. Fig. 7 is a face view of another detail.

In said drawings, A represents the revoluble feed-casing provided with a bulge a and having therein the eccentric or cam slots d a2 a3, said casing being secured in position by the engagement vof the segmental flanges a4 a5 a on the rim a7 with the flanges b o b2 of the wheel B and said bulge having a central opening thereinfor the passage of the feed-screw. The wheel B is secured in position by the washer c, said washer resting in the annular recess hsin the hub h4 of said wheel and being secured by screws, as shown at c2, to the inner end .of the hub c', said hub having a key or spline c3 for engagement with a suitable key-seat in and preventing the rotation of said plate on said feed-screw.

The spokes of the wheel B are provided with grooved flanges e e e2, the same forming radial slideways for the nut sections E E E2, which sections are internally threaded and have their bases e3 c4 c5 formed with lateral ribs e eT for engagement with the `grooves in said flanges.

ff f2 are set-screws passing through and having their heads normally in the slots a a2 co3 and secured in the threaded openings es e9 c10 in the bases of the nut-sections. Obviously as the feed-casing is rotated (for instance, in the direction indicated by the arrows in Fig. l) the screws ff f2 will be forced uniformly away from the center, carrying with them and causing the total disengagement of said sections from the correspondingly-threaded feed-screw F, the bulge a affording clearance for the movement of the sections. At the same time the ends of the cam-slots are so disposed relatively to the iianges 0,4 a5 a6 as to prevent the disconnection of said flanges thereof from the flanges b b b2, with which they interlock, and the consequent displacement of the feed-casing. Thus it is possible by the simple rotation of the casing last mentioned to entirely disconnect the tool from the feed-screw regardless of the position of the same thereon, effecting a great saving in the amount of time and labor necessary for the attainment of the same end.

C is a recess resulting from the formation of the flange c4 on the plate C-and provided with a cap or cover M. In said recess are located the gear-wheels G G', the latter being placed side by side and having central openings g therein, the inner end g2 of the boringbar Gr2 being inserted in the space g3 between the inner edges of the Wheels and the hub c and having thereon the key or spline g, such key or spline engaging with a key-seat in said inner edges. As will be observed, the cover M is provided with a hollow boss m, the same having therein a peripheral groove m", and is secured to the flange cLl and the boss c5by the screws m3, thus serving to keep the gears in place in the recess.

c5 is a boss on the plate C, havnga diminished portion c6 eccentrically disposed rela- TOO tively to the main portion of said boss and supporting the gear II, the latter meshing with thegear G.

H is another gear-wheel, the same being` sustained on the sleeve or hollow shaft Zt and having a recess h2 in its inner face. Said sleeve has its bearings in the upper part c7 of the base-plate, and in the boss Zt is provided with the crank H2 on one end, has the other end Zt threaded for reception of the nut 7c, and has integral therewith the pinion 7c3.

K is a rod or plunger swivelly secured in the sleeve h by the nut 7.a', said rod at its inner end bearing against the spring 7oz and having secured therein the pin h3.

L represents a gear-wheel similar to and secured at a distance from the gear H on the sleeve Zt, leaving an intermediate space slightly wider than the pin h3, said gear L having in its inner face opposite the recess h2 the recess Z.

N represents a split collar or clamp having its sections n n secured together and caused to tightly grasp the boringbar G2 through the passage of the bolts m2 through thelugs '112mg thereof. Said clamp or collar is also provided with a flange n4 at its inner end, the same having therein an annular groove m5, in which latter is loosely fitted the flange m4 of the boss m, while the portion n of the flange n4 loosely engages with the annular groove m4 in the hub m. Thus the boring-bar is swivelly connected to the boss m and secured against detachment therefrom upon the operation of the feeding devices in the return direction. l

As the nut k is unscrewed the rod K will be drawn outwardly and the pin h3 drawn into the recess h2, the result being that the motion which is imparted to the boring-bar by a separate motor, as ordinarily or otherwise, is communicatedl to the nut-sections through the gears G H H and the pinion 7c3 and wheel B through the medium of the teeth b5 on the latter, resulting when said sections are in the posit-ion shown in the drawings in the feeding of the boring-tool forwardly or to the right of said drawings. On the other hand, when it is desired to feed said bar backwardly or to the left of the drawings, causing the operation of the cutters on the return movement, the nut 7c is screwed inwardly, effecting the movement of the rod K and pin hfin the same direction, causing the engagement ofthe latter with the recess Z in the gear L, which gear meshes with the gear L said gear L clearing the gear G and meshing with the intermediate gear L2, which latter in turn meshes with said gear G, .which is on the boring-bar. Thus themotion of thelatter is communicated in a reversed condition to the nut-sections through the gears G L2 L L, pinion 7c3, and the wheel B, thus attaining the result desired.

W'hen it is desired to feed the boring-bar by hand, the pin h3 is drawn or thrust by the operation ofthe nut 7a into the space Z between the gears L and H', as shown in Fig. 3,

permitting said pin to clear the' recesses in said gears, whereupon the crank H2 is free to be turned and the nut-sections rotated through the pinion 7e3 and the wheel B.

What I claim as my invention is as follows:

l. In a boring-tool, the combination of the boring-bar, the feed-screw, a sectional rotary nut for engagement with said screw, mechanism for actuating said nut, an oscillating disk provided with eccentric or cam slots, and suitable projections, sustained by the nut-sections, engaging with said slots, substantially as and for the purpose specified.

2. Ina boring-tool, the combination of the boring-bar, the feed-screw, a sectional rotary nut for engagement with said screw, a toothed 4t. In a boring-tool, the'combination of the boring-bar, the feedscrew,a sectional nut for engagement with said screw, an oscillating disk provided with eccentric or cam slots for reception of projections on the nut-sections, a toothed wheel affording radial slideways for said sections, actuating mechanism for said wheel, and means for reversing the direction of movement of -said mechanism, substantially as and for the purpose specified.

5. In a boring-tool, the combination of the boring-bar, the feed-screw, a sectional nut for engagement with said screw, an oscillating disk provided with eccentric or cam slots for reception of projections on the nut-sections, a toothed wheel aording radial slideways for said sections, a train of gears intermediate said wheel and the boring-bar, having therein a pair of oppositely-disposed gears provided with a recess in their opposite faces and located at a distance apart, a hollow journalsupport for the recessed gears, having a 'pinion meshing with said toothed wheel, a springcontrolled laterally-movable rod in said journal, and a pin in said rod for alternate engagement with the respective recesses, substantially as and for the purpose specified.

6. In a boring-tool, the combination of the boring-bar, the feed-screw, actuating mechanism intermediate the bar and screw, the toolcasing provided with an annular flange, and a split collar provided with means whereby it is clamped on said bar and having therein an internal annular groove for reception of said flange, substantially as and for the purpose specified.

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7. In a boring-tool, the combination of the y' boring-bar, the feed-screw, a sectional nut for engagement with said screw, the casing A, having the slots a a a therein for reception of projections on the nut-sections, the Wheel B, affording slideways for said sections, said wheel and casing having the interlocking flanges b b h2 and a4 a5 a6, and suitable gears intermediate the Wheel B and the boring-bar, substantially as and for the purpose specied.

8. In a boring-tool, the combination of the boring-bar, the feed-screw, a train of gears intermediate said bar and screw, the gears L and H in said train and having therein the recesses Z and 7a2, respectively, the sleeve h, supporting said gears and threaded for reception of the nut 7c, the rod K in said sleeve and secured by the nut 7c', the spring 7a2, and the pin h3 in said rod for engagement alternately with said recesses, substantially as and for the purpose specified.

9. In a boring-tool, the combination of the boring-bar, the feed-screw, the base-plate C, provided with the flange c4, suitable gears intermediate said screw and bar in the recess formed by said flange, the cover M, provided -with theboss m, and the clainpN, secured to the vand provided With the recesses h2 and l, the

gear L on said boss, the gear L2, the-gear Gr', havinga seat for the key g, and means for conveying the inotion ot' the gears to the feeding devices, substantially as and for the purpose specified.

In testimony whereof I have hereunto set my hand this 27 th day of October, A.D. 1891.

JOI-IN T. KIEHNER.

Titnessesr THEO. C. WARNER, WM. H. POWELL. 

